Fastening inserting machine



Feb. 20, 1934. G, GODD'U H M 1,947,589

FASTENING INSERTING MACHINE Filed May 18, 1932 Patented Feb. 20, 1934 1,947,589 FASTENING INSERTING MACHINE George Goddu, deceased, late of Winchester, Mass., by Isabelle W. Goddu, executrix, Winchester, Mass., and Fred L. MacKenzie, Beverly, Mass., assignors to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application May 18, 1932. Serial No. 612,064

7 Claims.

This invention relates to fastening inserting mechanisms and is illustrated as embodied in a hand tacker such as is commonly used in the lasting of shoes.

After the end portions of the shoe upper have been worked into place in the bed lasting machine it is usual to secure certain portions of its margin (the heel end, and in some classes of work, the toe end) to the insole by driving tacks or other fastenings through the upper and insole, clinching the tacks against a metal plate carried by the last. These tacks are ordinarily driven by a hand tacker which is provided with a nozzle arranged to be brought into engagement with the shoe upper and a reciprocable plunger carrying a driver, the lower end of which is flush with the end of the nozzle when the plunger is depressed. With such a device the tacks are driven into the work with their heads flush with the surface of the work. It is desirable, however, to insert tacks in certain portions of the shoe bottom with their heads upstanding from the surface of the work, for example, when driving tacks at the toe end of the shoe to receive a toe binder wire, as in the manufacture of Goodyear welt shoes, or to insert fastenings in the shoe bottom which are later to be removed. The hand tacker disclosed in United States Letters Patent No. 500,225, granted June 27, 1893, on an application of J. E. Crisp, for inserting fastenings flush with the surface of the work has gone into extensive use and is satisfactory when the heads of the fastenings are to be driven flush with the surface of the work, but itis not practicable with it to drive fastenings with their heads upstanding from the surface of the work.

An object of the invention is to provide a hand tacking device which will drive fastenings flush with the surface of the Work or with the heads of the fastenings upstanding from the surface of the work, at the will of the operator.

With this object in view in the illustrated tacker the sleeve and a plunger reciprocable therein are provided with a stop which is constructed and arranged to be moved into and out of the path of movement of the plunger at the will of the operator, to vary the length of the stroke of the plunger whereby fastenings may be driven into a work piece varying distances. As disclosed herein, this stop device includes a support clamped to the sleeve, a pair of pivotally mounted arms mounted on the support for movement into and out of engagement with the plunger, a finger piece slidably mounted in the bracket and secured to one of the arms for moving the arms, and a of mechanism which will now be described.

detent for maintaining the finger piece in adjusted position. p

With the above and other objects and features of the invention in view the invention will be described in connection with the accompanying drawing and pointed out in the claims.

In the drawing, 1 Fig. 1 is a side elevation of a hand tacker illustrating one embodiment of the invention;

Fig. 2 is a plan view showing the parts of the device in position to drive a tack with its head upstanding from the surface of the work; and Fig. 3 is a fragmentary view in side elevation of portions of the device at the conclusion of'the driving stroke when tacks are being driven with 79 their heads upstanding from the surface of the work. r The fastening inserting device illustrated is provided with a plunger 10 which is constructed and arranged to reciprocate in a sleeve 12 at the lower end of which is secured a throat 14. Be-

tween the sleeve 12 and the throat 14 is a mechanism for separating fastenings 18 from the fastenings in a raceway 20. The fastening separating mechanism is of. the type disclosed in United States Letters Patent No. 1,567,428, granted December 29, 1925 on application of Ren Duplessis. Reference may be had to the above-mentioned Letters Patent for a more complete description of the separating mechanism.

The lower end of the sleeve 12 is provided with a driver 22 which is preferably secured to the plunger 10 in the manner disclosed in the abovementioned Letters Patent. The driver is adapted to be reciprocated a predetermined distance to drive the tacks flush with the surface of the work but, when it is necessary or desirable to do so, the fastenings may be inserted with their heads upstanding from the surface of the work by means The upper end of the sleeve 12 is provided with a flange 24 and the upper end of the plunger 10 is provided with an enlarged end portion 26. When the fastenings are to be inserted flush with the surface of the work, the parts of the device are so arranged that the enlarged portion 26 of the plunger will be in'engagement with the flange 24 at the conclusion of the driving stroke. When it is desired to move the plunger a lesser distance, it is necessary to provide some means for limiting the movement of the plunger 10, and for this purpose a mechanism 28 is rigidly secured to the top of the sleeve 12.

As shown most clearly in Figs. 1 and- 2, the mechanism 28 is secured to the sleeve 12 by means 1 of cap screws 30 which act as clamping screws to clamp supporting members 32 and 34 for the mechanism 28 to the sleeve 12.

Arms 36, 38 arepivotallymounted on the supporting members 32 and 34 by means of pins and 42, respectively. The arms 36 and 38 are bell crank levers, the short arms 39 and 41 of which are provided with intermeshing gear teeth 43,- 45;

whereby movement of one arm is imparted to the other arm. The arms 36 and 38 are also provided with arcuate slots 44 and 16 through which extend headed studs 48 and 50 for limiting movement of the arms.

It is desirable from the standpoint of convenience to provide means for moving the arms from inoperative position to operative position and to this end the machine is provided with a finger piece 52 which is movable in a slot in'the member 34. The piece 52 may be secured to either of the arms 36 or 38 but in the illustrated embodiment of the invention the finger piece 52 is secured to the arm 38 by means of a pin 54. In order to insure that the arms are maintained in proper position, the finger piece 52 is provided with a pair of notches 56, 5'7. A detent 58, having an end portion which fits into the notches, is urged toward an end of a slot into the notch by means of aspring which is so constructed that accidental movement of the finger piece 52 is prevented without, however, rendering it unduly difficult to move the arms 36, 38 from one position to another when it is desirable to do so.

Although the parts of the device have been described in detail it is believed it would be advantageous to describe briefly the operation of the device and the position of the parts during the operation of the device. When the parts are in the position shown in full lines in Figs. 1 and 2 the end of the plunger is struck by a maul 62,

the plunger 10 and the driver 22 will be forced downwardly to drive a tack into a work piece. The enlarged upper end 26 of the plunger 10 will strike the'arms 36, 38 thus limiting the'downward movement of the plunger, and the tack will be driven into the workwith the head of the tack upstanding above the surface of the work, as

shown in Fig. 3. When it is desired to drive a tack or other fastening flush with the surface of the work, the arms 36 and 38 are moved outwardly to the position shown in dotted lines in Fig. 2. Then, when the end of the plunger 10 is struck by the maul 62, the plunger is moved downwardly until the enlarged upper end 26 of the plunger strikes the fiange 24 of the sleeve 12. The plunger is thus moved the maximum distance and a tack inserted with portions of the device in the position just described will be driven with its head flush with the surface of the work.

'work, a bracket clamped to said sleeve, and

means pivotally secured to said bracket and embracing said plunger to shorten the path of movement of the plunger thereby driving the fastenings into the work with their heads projecting above the surface of the work.

2. In a hand tacker, a sleeve, a plunger reciprocable within said sleeve, a fastening inserting driver secured to the plunger, a supporting member clamped to the upper end of said sleeve,

work with the heads of the fastenings extending a pair of arms pivotally secured to said member and arranged to be moved into engagement with the plunger to limit the length of stroke of the plunger, means secured to one of saidarms arranged to move the arms into or out of position, and a member arranged to engage said means to maintain said means in adjusted position.

3. In a hand tacker, a sleeve, a plunger mounted within said sleeve and adapted to be moved within said sleeve a predetermined distance to insert fastenings flush with the surface of the work, and means secured to said sleeve and embracing said plunger to vary the length of movement of the plunger to drive fastenings into the above the surface of the work, said means including a Supporting bracket clamped to the sleeve, a pair of arms pivotally mounted on said bracket and adapted to be moved into or out of engagement with the plunger, 9, member secured to one of said arms andarranged to move said arms into or out of position at the will of the operator, and means for maintaining said member and said arms in adjusted position. v

4. In a hand tacker, a sleeve, a plunger mounted within said sleeve and having an enlarged end portion, said plunger being adapted to be moved within said sleeve a predetermined distance to insert fastenings flush with the surface r of the work, and means secured to said sleeve arranged to embrace said plunger below said enlarged end portion to vary the length of movement of the plunger to drive fastenings into the work with the heads of the fastenings exp tending above the surface of the work, said means including a supporting bracket clamped to the sleeve, a pair of arms pivotally mounted on said bracket and adapted to be moved into out of engagement with the plunger, a finger piece slidably mounted in said bracket and secured to one of said arms and arranged to move said arms into or out of position at the will of theoperator, and a detent arranged to engage notches in said finger piece to maintain the finger piece in adjusted position.

5. In a hand tacker, a sleeve, a reciprocable plunger within said sleeve, a bracket clamped adjacent to the upper end of said sleeve, a pair of arms pivotally mounted on said bracket, and means secured to one of said arms constructed and arranged to move said arms into or out of position .to limit the extent of movement of said plunger to permit fastenings to be driven either flush with or upstanding from the surface of the work, said means comprising a link pivoted to one of said arms and a detent mounted in said bracket and arranged to engage said link to maintain the link in adjusted position.

6. In a hand tacker, a sleeve, a reciprocable plunger within said sleeve, a driver secured to said plunger, a bracket clamped adjacent to the upper end of said sleeve, a pair of arms pivotally mounted on said bracket, means connecting said arms constructed and arranged to in-- sure equal and opposite movement of said arms, and means secured to one of said arms constructed and arranged to move said arms into or out of the path of movement of the plunger to limit the extent of movement of said plunger to permit fastenings to be driven either flush with or upstanding from the surface of the work, said means comprising a link pivotally connected to one of said arms and a detent mounted in said bracket and arranged to engage notches in;

into or out of position below said enlarged portion of said plunger to vary the extent of movement of the plunger to permit tacks to be driven with their heads either upstanding from or flush with the surface of the work, and a detent mounted in said bracket and arranged to engage notches in said link to maintain the link in adjusted position.

ISABELLE W. GODDU, Executria: of the will of George Goddu, deceased,

FRED L, MACKENZIE. 

